HackEight附加Ken Burns特效的幻灯片(属性动画的使用)

 1 public class MainActivity extends Activity implements AnimatorListener {
 2     private FrameLayout container;
 3     private ImageView mImg;
 4     private int[] imageIDs = { R.drawable.photo1, R.drawable.photo2,
 5             R.drawable.photo3, R.drawable.photo4, R.drawable.photo5,
 6             R.drawable.photo6 };
 7     private int mIndex;
 8 
 9     private Random mRandom;
10 
11     @Override
12     protected void onCreate(Bundle savedInstanceState) {
13         super.onCreate(savedInstanceState);
14         mRandom = new Random();
15         container = new FrameLayout(MainActivity.this);
16         container.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,
17                 LayoutParams.MATCH_PARENT));
18         mImg = createImageView();
19         container.addView(mImg);
20         setContentView(container);
21     }
22 
23     @Override
24     protected void onResume() {
25         super.onResume();
26         doAniamtion();
27     }
28 
29     private ImageView createImageView() {
30         ImageView img = new ImageView(MainActivity.this);
31         img.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,
32                 LayoutParams.MATCH_PARENT));
33         img.setScaleType(ScaleType.FIT_XY);
34         img.setBackgroundResource(imageIDs[mIndex]);
35         mIndex = (mIndex+1 < imageIDs.length) ? mIndex+1 : 0;
36         return img;
37     }
38 
39     private void doAniamtion() {
40         // 对view进行随机动画
41         AnimatorSet set = new AnimatorSet();
42         int index = mRandom.nextInt(imageIDs.length);
43         switch (index) {
44         case 0:
45             set.playTogether(ObjectAnimator.ofFloat(mImg, "scaleX", 1.5f, 1f),
46                     ObjectAnimator.ofFloat(mImg, "scaleY", 1.5f, 1f));
47 
48             break;
49         case 1:
50             set.playTogether(ObjectAnimator.ofFloat(mImg, "scaleX", 1, 1.5f),
51                     ObjectAnimator.ofFloat(mImg, "scaleY", 1, 1.5f));
52 
53             break;
54         case 2:
55 
56             set.playTogether(ObjectAnimator.ofFloat(mImg, "rotationX", 0.0f,
57                     360.0f));
58             break;
59         case 3:
60             AnimatorProxy.wrap(mImg).setScaleX(1.5f);
61             AnimatorProxy.wrap(mImg).setScaleY(1.5f);
62             set.playTogether(ObjectAnimator.ofFloat(mImg, "translationY", 80f,
63                     0f));
64             break;
65         default:
66             break;
67 
68         }
69 
70         set.setDuration(3000);
71         set.addListener(this);
72         set.start();
73 
74     }
75 
76     @Override
77     public void onAnimationCancel(Animator arg0) {
78 
79     }
80 
81     @Override
82     public void onAnimationEnd(Animator arg0) {
83         container.removeView(mImg);
84         mImg = createImageView();
85         container.addView(mImg);
86         doAniamtion();
87     }
88 
89     @Override
90     public void onAnimationRepeat(Animator arg0) {
91 
92     }
93 
94     @Override
95     public void onAnimationStart(Animator arg0) {
96 
97     }
98 
99 }